Clinton: I'm the one who can make things happen

Hillary Clinton continued to compare her policies and her endorsements to those of rival Democratic candidate Bernie Sanders on Sunday, just a day ahead of the Iowa Caucuses.

"I've been endorsed by The Brady Campaign and yesterday in a very emotional event in Ames, Iowa, endorsed by Gabby Giffords and her husband, Mark Kelly, because they believe I'm the leader that they want to stand up to the gun lobby," she said on ABC's "This Week."

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"The same with the Human Rights Campaign: They concluded I was the leader to protect and advance the cause of the rights of the LGBT community."

The Clinton campaign has been working to differentiate the former secretary of state's accomplishments in recent weeks, including criticizing Sanders voting record on gun issues, as well as questioning whether his campaign plans can actually become successful laws.

Clinton said Sunday she will not make promises to voters that she does not believe can make it through congress or be viable with the American people.

"Obviously I have big goals. I want to get to universal coverage; I want to get the economy working for everybody, not just those at the top" she said. "Get incomes rising, get women equal pay, raise the minimum wage, have a renaissance in manufacturing, move toward clean, renewable energy — I have big goals. And I tell you how I'm going to get there and how I'm going to pay for them."

"I'm not going to sit here and over-promise and under-deliver. I'm going to tell you what I know we can achieve, and that's going to take the political system we have right now, and then I intend to bring in more people, as always have," she continued.